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WO2008151245A1 - Dispersion pour films plastiques - Google Patents

Dispersion pour films plastiques Download PDF

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Publication number
WO2008151245A1
WO2008151245A1 PCT/US2008/065798 US2008065798W WO2008151245A1 WO 2008151245 A1 WO2008151245 A1 WO 2008151245A1 US 2008065798 W US2008065798 W US 2008065798W WO 2008151245 A1 WO2008151245 A1 WO 2008151245A1
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Prior art keywords
ionomer
pigment
carrier
dispersion
polymer
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PCT/US2008/065798
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English (en)
Inventor
George Robertson
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Sun Chemical Corp
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Sun Chemical Corp
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
    • C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing atoms other than carbon or hydrogen
    • C08L23/0869—Copolymers of ethene with unsaturated hydrocarbons containing atoms other than carbon or hydrogen with unsaturated acids, e.g. [meth]acrylic acid; with unsaturated esters, e.g. [meth]acrylic acid esters
    • C08L23/0876—Salts thereof, i.e. ionomers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
    • C09B67/0001—Post-treatment of organic pigments or dyes
    • C09B67/0002—Grinding; Milling with solid grinding or milling assistants
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
    • C09B67/006—Preparation of organic pigments
    • C09B67/0063—Preparation of organic pigments of organic pigments with only macromolecular substances
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/22—Compounds of iron
    • C09C1/24—Oxides of iron
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/44—Carbon
    • C09C1/48—Carbon black
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/10—Treatment with macromolecular organic compounds
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/22—Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0041—Optical brightening agents, organic pigments
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group

Definitions

  • This invention relates to the coioring of polymers using pigment pre- dispersions designed to impart superior color strength, dispersion level, and transparency/opacity.
  • 6,528,174 is directed to ethylene copolymers with vinyl acetate or with lower alky! acrylates, and ethylene terpoiymers with vinyl acetate and carbon monoxide as film-forming compositions with an olefinic bisoleamide additive.
  • U.S. 2002/0055006 is directed to colored multilayer thermoplastic sheets for surfacing polymer parts made up of layers of ionomers, ionomer polyethylene or polyamide blends, and polyethylene.
  • the ionomers are derived from copolymers of ethylene and carboxylic acids, in particular various lower alkyl acrylates.
  • the structural polymers include thermoplastic polyolefins, polyesters, sheet molding compounds, acryionitrile butyl styrene, polyvinyl chloride, polystyrene, polyurethane, and polyethylenes.
  • Pigments are introduced by forming a millbase with dispersing resins which may be the same as or closely related to the pigment-incorporating material and later dispersing the pigment by conventional grinding or milling.
  • U.S. 2005/0227022 is directed to multilayered laminates made from ionomers and acid polymers contacted with substrates such as polyolefins.
  • One ionomer layer may be pigmented. Only pigmentation by concentrated pellet form is specified.
  • the ionomers include alpha-olefin derived units such as ethylene and alpha, beta-ethylenically unsaturated carboxylic acid derived units.
  • the structural materials include foams, thermoplastics, elastomers, polyolefins, polypropylenes and polyethylenes, plastomers, acrylonitrile-butadiene-styrine terpoiymers, acetal and acrylic polymers, cellulosics, fluoroplastics, polyamides, polycarbonates, polyesters, polystyrenes, and other such materials.
  • U.S. Patent No. 6,432,598 is directed to nonflushing methods of making particulate yellow toner compositions for electrostatographic image development by predispersing dry Pigment Yeiiow 185 in a thermoplastic polymer such as polyesters, polyamides, pofyolefins, acrylic polymers and copolymers, methacryfic or styrenic or vinyl polymers and copolymers, and polyurethanes and then combining the pre-dispersion with a second thermoplastic polymer.
  • a thermoplastic polymer such as polyesters, polyamides, pofyolefins, acrylic polymers and copolymers, methacryfic or styrenic or vinyl polymers and copolymers, and polyurethanes and then combining the pre-dispersion with a second thermoplastic polymer.
  • An object of the invention is a method for making a pigment pre-dispersion composition for use with an ionomer comprising the steps of:
  • Another object of the invention is a pigment pre-dispersion composition for use with an ionomer comprising:
  • Another object of the invention is a melt blended composition
  • a melt blended composition comprising:
  • Another object of the invention is a method for making a pigment pre- 0 dispersion composition for use with a polymer comprising the steps of: a) combining an aqueous pigment with a carrier; and b) optionally melting the carrier if in solid form. oring a polymer, comprising the steps of: a) mixing an aqueous pigment with a carrier, said carrier being 5 optionally melted if in solid form to produce a pre-dispersion; and b) mixing the pre-dispersion with the polymer.
  • Another object of the invention is a pre-dispersion having a dispersion level of about 0.1 microns to about 5 microns.
  • Another object of the invention is a colored polymer having a dispersion level of about 0.1 microns to about 5 microns.
  • the process of this invention makes use of flushing technology to achieve ,0 superior color strength, dispersion level, and transparency/opacity of a pigment in a high molecular weight organic polymer.
  • the process of this invention provides excellent dispersion levels and film transparency which current dispersion processes cannot achieve.
  • the process is particularly effective for coloring molded plastics and laminates. 5
  • the process used for making a dispersed pigment composition comprises first obtaining a pigment in an aqueous environment, then combining the pigment in the aqueous environment with a carrier to form a pre-dispersion; and finally removing the water from the pre-dispersion to obtain a dispersed pigment
  • the dispersed pigment composition is then mixed with a polymer.
  • 5 rwpr ⁇ ment may be in an aqueous state, such as a presscake or slurry or dispersion, or water or other liquid added to form an aqueous state.
  • the pigment may added before or after the carrier, but preferably after especially if the carrier is being melted before the pigment is added.
  • the pigment may be added in one portion or in several portions.
  • the process may be performed at almost any temperature, but a temperature range of about 50 0 C to about 13O 0 C is preferred, and a range of about 85°C to about 95 0 C is especially preferred.
  • the amount of pigment may vary from about 0.1 weight percent to about 60 weight percent, based on the total aqueous pigment and carrier in the pre-dispersion, preferably the amount of pigment is from about 20 weight percent to about 50 weight percent.
  • the amount of carrier may vary from about 0.1 weight percent to about 90 weight percent, based on the total aqueous pigment and carrier in the pre- dispersion, preferably the amount of carrier is from about 50 weight percent to about 80 weight percent.
  • the pigment dispersion process is preferably a flushing process, where a pigment presscake (or any form of pigment combined with water, such as aqueous pigment slurry) is placed in an appropriate receptacle such as a flusher and the carrier is added in one or more portions.
  • a pigment presscake or any form of pigment combined with water, such as aqueous pigment slurry
  • the carrier is added in one or more portions.
  • the amount of water present is determined by the amount of water in the presscake or otherwise associated with the pigment. More water can be added if desired.
  • a pigment in a water wetted form (such as a presscake or slurry) is transferred into the carrier and the associated water is removed, resulting in the replacement of the water by the chosen carrier.
  • the flushing carrier may be in solution in a solvent or may be a material that is liquid or softened at the flushing temperature. Flushing provides good dispersion because the pigment does not go through drying, powdering, and redispersion but goes directly from aqueous phase into the carrier, (see, for example, Pigment Handbook Vol. Ill T. Patto ⁇ , ed.), 447- New York, John Wiley & Sons, 1973; Printing Ink Manual 3rd ed.
  • the ⁇ ;ar ⁇ er may be in solution in an appropriate solvent or may dispersed in a material, as long as the solvent or the material are liquid or softened at the flushing temperature.
  • the carrier itself may be liquid at the flushing temperature and suitable for addition in pure form. Solvent and carriers known in the art may be employed.
  • the resulting "pre-dispersion" of aqueous pigment and carrier is mixed by conventional means to generate mechanical shear, i.e. stirring, agitation, milling.
  • Various types of mixers may be used, for example a sigma blade mixer, double arm mixer, or extruder, cowles dissolver, a single blade mixer, a banbury mill, a gaullin homogenizer and the like as well as combinations thereof Water separates and can be poured off. Conventional wetting agents may be added if necessary. The process may be repeated twice or many times if desired. As the water comes off and is decanted, the pigment particles become surrounded by carrier and are thus transferred to the carrier.
  • the small amounts of water that remain may be removed by other means such as evaporation.
  • the procedures of removing water by decantation and further by evaporation may be used to control and improve the pigment dispersion.
  • Water evaporation can be used to control temperature and thus viscosity for a dispersion period which may be extended by adding more water.
  • a further period of dispersion by shear may be used, with external heating or cooling of the machine jacket used to control the temperature. Temperature control and shear can be used to obtain the best dispersion properties.
  • a continuous flush process as detailed in US 2005/0092203 may be used if desired.
  • the level of viscosity achievable is determined by power usage of the motor horse power.
  • the desired level of dispersion in the pre-dispersion may be examination of a thin film.
  • the preferred range of viscosity and dispersion depends on the application for the structural polymer which the pigment pre-dlspersion will be used to color. For example, a preferred range of dispersion for automotive parts, films, and laminates is from about 0.1 micron to about 5 microns; a preferred range of dispersion is less than 1 micron. A dispersion range of about 0.8 micron to about 0.3 micron is most preferred. A wide range of viscosities may be employed.
  • a dry pigment can be used in this process. Not all pigments are available in presscake form. However this technique can also be applied to conventional organic pigments which are more conveniently utilized dry even when presscake is available.
  • pigments are not in presscake form, for example inorganic pigments produced by a high-temperature drying process, such as carbon black, iron oxide, and special mixed metal oxides, the process can still be used.
  • the dry pigments may be slurried in water, preferably with the aid of a surfactant/dispersant in preparation for the flushing process, such as for example an ionic surfactant. It is preferred to keep the amount of dispersant to a minimum.
  • Preferred ratios are not critical, but are typically are as follows: pigmentwate ⁇ surfactant about 10:98:2 to about 50:45:5 and preferably about 20-30:75-65:2-5.
  • any previous added surfactant should be deactivated.
  • One means for deactivating is converting the surfactant's water solubilizing group to a much less water soluble form causing the surfactant to come out of the aqueous solution.
  • Convenient approaches involve using surfactants with a water soluble group such as sulfonic, sulfate, or carboxylic In their acid or alkali metal salt forms.. These can be reduced in solubility by adjusting the pH or neutralizing the acid group.
  • Typical surfactants include for example ionic surfactants, fatty acid salts such as sodium oleate, potassium oleate, ammonium oleate or similar S&rre 'OT 'essW' ⁇ fll fatty acid, or similar salts of rosin acid (mixture of naturally occurring acids including abietic acid) and the like and combinations thereof.
  • a dry carbon black pigment can be dispersed in water using water soluble sodium oleate salt. The dispersed black is then added to the flusher and the pH adjusted to below 6, then the pigment flushes into the carrier and water is decanted. The slurry resulting can be added as presscake to attain the correct pigment content of the carrier.
  • the pigment pre-dispersion made by the above general process is particularly useful for coloring structural polymers and ionomers and described below.
  • the polymers are also useful as carriers with suitable characteristics in relation to the base structural polymers and ionomers as described below.
  • the pre-dispersion is added to the material to be pigmented by known techniques, for example by extrusion in single or double screw extruders or double arm mixers such as a Banbury mixer or other known equipment and the like, or combinations thereof.
  • the pigmented material may then be used to make products as desired.
  • the pre-dispersions are especially suitable for pigmenting polymers and ionomers used to make molded plastics, backfill, films, and laminates and other articles of manufacture.
  • Examples of structural polymers are foams, rubbers, plastomers, thermoplastics, elastomers, for example polyolefins, polyesters, sheet molding compounds, acrylonitrile butyl styrene, polyvinyl chloride, polystyrenes, polyurethanes, polyethylenes, polypropylenes acetal and acrylic polymers, cellulosics, fluoroplastics, polyamides, polycarbonates, and the like.
  • foams for example polyolefins, polyesters, sheet molding compounds, acrylonitrile butyl styrene, polyvinyl chloride, polystyrenes, polyurethanes, polyethylenes, polypropylenes acetal and acrylic polymers, cellulosics, fluoroplastics, polyamides, polycarbonates, and the like.
  • Ionomers are copolymers a certain percentage of whose repeating units are ionic.
  • Examples of ionomers which are useful in forming films or laminates include alpha-olefin-derived units, and alpha r beta-ethylenically unsaturated s wi sui a e ions suc as me a ions wnicn are mon , i, tri valent, such as sodium, zinc, calcium and the like.
  • Salts with these ions are typically formed with the acid group of the carboxyiic acid.
  • Specific ionomers include copolymers of ethylenic monomers and acrylic acid or its analogues. Ionomers are salts of the acid group in the carboxyiic acid (preferably acrylic acid or analogue such as lower alkyl acrylic acid). The acid may be present as free acid groups or converted to salts resulting in ionomer products. These and similar structural polymers and ionomers are well known in the art.
  • These compounds can be commercially obtained or can be synthesized by well known processes. Also, these compounds can be chemically modified by well known process in order to provide versions having desired characteristics in terms of compatibility as defined below.
  • compatible carriers into which pigment is flushed provides optimum properties for plastic components.
  • Carriers can be any polar polymer or ionomer having a molecular weight that is less than the molecular weight of the polar polymer or ionomer being used for the structural application (such as the plastic item, backfill, film or laminate).
  • the carrier into which pigments are flushed are selected to be compatible with the structural polymer or ionomer to be used in the contemplated application, for example by selecting a carrier which is the same molecular entity as the structural polymer or ionomer for the given application, but of lower molecular weight.
  • Polar polymers as those containing 10% molar of such polar groups as carboxyiic acid, carboxyiic metal salts, carboxyiic acid esters or amides, ethers or halogens and the like or combinations thereof. These may be copolymerized with non polar components which are predominantly straight or branched aliphatic chains such afSMgmy ⁇ er ⁇ , o" pr ⁇ yfene, butyle ⁇ es or higher analogs and the like or combinations thereof.
  • the level the polar molar % should be between 5% and 100%. It is preferred that the level poiar units are simitar in both the flush vehicle and fabricating polymer, In particular using as a carrier the same or a closely related molecular entity as the structural polymer which is of lower molecular weight (for example the same structure but with fewer backbone units) will provide compatibility.
  • Compatibility between the structural polymer for coloring and the carrier polymer for the pigment pre-dispersion may be determined by various other physical and/or chemical means.
  • melt flow index is a convenient measure for this purpose.
  • the melt flow index measures ease of flow of a melted thermoplastic polymer. It is used herein as the weight in grams which flows in ten minutes through a capillary of a given diameter and length. MFI is inversely proportional to viscosity, and a high melt flow rate corresponds to a low molecular weight. Lower MFIs require higher power for pre- dispersion, while higher MFIs tend to weaken the physical properties of the resulting film.
  • the standard ASTM D1238 test is used at a temperature of 190 0 C and a pressure of 2.16 kg.
  • the preferred MFI for structural polymers and ionomers is from 0.1 to 200.
  • the preferred MFI for carriers is from 10 to 110, preferably from 30 to 90, and more preferably from 40 to 80.
  • any of the polymers listed above may be used as carriers in a suitable molecular weight.
  • Preferable carriers are copolymers ethylenic monomers and acrylic acid or its analogs.
  • Ionomers are salts of the acid group in the carboxylic acid (preferably acrylic acid or analogue). The acid may be present as free acid groups or converted to salts resulting in ionomer products. Typical salts include W s ⁇ rtrm, 2i ⁇ c ⁇ or calcium.
  • the add value of the carrier is preferably a range of about 1to about 100. A preferred acid value is 20.
  • Specific polymers are Honeywell AC-540, 580, or 5120 and ionomers AClyn 201 , 246, 285, or 295. These compounds are commercially available carriers which have lower MFI Carriers of lower MFI may be controlled by MW, selection of monomer type and ionomer type and content.
  • the process of this invention may be applied to any conventional organic or inorganic pigments, in crude or conditioned or unfinished form, such as azos, arylides, diarylides, indolines, iso indolines, indolones, iso indolones, azolones, naphthols, toluidines, rubines, lithols perylenes, rhodamines, quinacridones, benzimidazolones, anthraquinones, phthalocyanines, anthrenes, carbazoles, dioxazines, iron oxides, mixed metal oxides, vegetable and carbon blacks, whites, metallic pigments, fluorescent pigments and the like or combinations thereof.
  • any conventional organic or inorganic pigments in crude or conditioned or unfinished form, such as azos, arylides, diarylides, indolines, iso indolines, indolones, iso indolones, azolones
  • Dyes may also be used.
  • the pigments should be in aqueous environment, such as a presscake or slurry.
  • the pigment content in the aqueous environment may be almost any amount, but is preferably from about 20% to about 80% of pigment solids in water, more preferably from about 20 to about 50%.
  • the pigment may be slurried in water to form a dispersion.
  • a surfactant may be used if the pigment is slurried, which can later be removed by various techniques, such as control of pH or addition of an insolubilizing metal ion.
  • the surfactant may be any known surfactant.
  • Pigment pre-dispersions of this invention are particularly useful when added to the pofymer by known techniques, such as but not limited to extrusion.
  • the carriers are selected to be compatible as described with the structural polymers or ionomers which will be used to make a final product such as a flrr ⁇ ejet ⁇ ⁇ pra&tf£ ⁇ ⁇ art or an extrude film.
  • Such parts may be used in automotive fabrication for various colored body parts
  • the structural polymer is a polar polymer, in particular a polar
  • the polymer with a low melt index and high viscosity or is an ionomer. Cotoring is facilitated by adding pigment such as to the main polymer to be colored in a predispersed form.
  • the pigment may be predispersed in a polymer matrix that is of lower molecular weight than the polymer that requires coloring.
  • the pre-dispersion carrier should be compatible with the main 0 polymer. Compatibility is important for maintaining the physical properties and clarity of the colored film. Incompatible carriers give rise to a haze which is unattractive for bright colors.
  • inventive pre-dispersion and the inventive pigmented polymer were observed in an optical microscope to determine the dispersion level of each. The same was done for the comparisons below.
  • the color of the inventive pigmented polymer including the inventive pre-dispersion was compared to (a) a dispersion of the same pigment as dry color into the same co-polymer at same level and then let down into the rigid PVC and, (b) a dispersion of the same dry color directly into the rigid PVC.
  • inventive pre-dispersion and the inventive pigmented polymer showed improved dispersion level compared to (a) and (b) above, as well as showing a visually more transparent affect.
  • Example 1 The process of Example 1 was repeated through the flushing stage but the PR177 presscake was replaced by an equal amount of a PB 15:1. After flushing, but before vacuum, 13 lbs. of de-ionized water was added slowly maintaining the material at >85°C. The material and water was then thoroughly mixed before decanting. The decanted water showed a slight rise in conductivity indicating value of washing in removing water soluble salts. Vacuum, cool down and grinding then proceeded as Example 1. Testing by the same procedure of Example 1 was done versus a dry sample of PB 15:1. The inventive pre- dispersion and the inventive pigmented polymer showed improved transparency and finer dispersion than the comparisons. x mp e
  • Example 1 The procedure of Example 1 was repeated but in place of a 30% presscake of PR 177, a 10% slurry of Carbon Black (Monarch 880 from Cabot) was used. (The slurry preparation is given below). After the 15 Ib. of slurry (1.5 fb pigment) was added, the pH was adjusted to 5 by addition of dilute (1N) acetic acid. On addition of the acetic acid, the black slurry flocculated and behaved like a presscake: flushing then occurred and water decanted. The process was then continued as Example 1 with two slurry additions of 5Ib slurry (0.5Ib pigment) in place of presscake, followed by pH adjustment to produce good flushing. After flushing of third slurry was complete, the flush was washed with city water (13tb and then de-ionized water (10Ib). The vacuum, cooling and grinding was then as in Examplei .
  • Example 3 The procedure of Example 3 was repeated but the Monarch 880 was replaced by a 25% slurry of Monarch 1300.
  • the Monarch 1300 slurry was made by the same procedure from 1.2 parts of Sylvatat DT-30 on 25 parts Monarch
  • Example 5 Testing was again as in the procedure used in Example 1 versus a dry sample of carbon black (Monarch 1300).
  • the inventive pre-dispersion and the inventive pigmented polymer showed improved transparency and finer dispersion than the comparisons. 0
  • Example 3 The procedure of Example 3 was repeated but the Monarch 880 slurry was replaced by a slurry of the dry powder of PY 110 (frgazin 3RLTN).
  • Example 3 The procedure of Example 3 was repeated but the Monarch 880 slurry was replaced by red iron oxide - PR 101 (KDT5094 ex RocKwood) slurry. (The slurry preparation is given below). For the flushing process a first add 5Ib was followed 5 by 2 adds of 1.6 Ib each. Washing, cooling and grinding was as in Example 1
  • Example 2 Testing was again as in the procedure used in Example 1 versus a dry sample of PR 101, as well as a slurry of PR 101 only including water and no surfactant.
  • iWFnwntive pre-ctispersion (including the slurry with the surfactant) and the inventive pigmented polymer showed improved transparency and finer dispersion than the comparisons.
  • a surfactant (fatty acid mixture (Sylvata! DT-30 by Arizona Chemical)) was added to 67 parts of water and pH adjusted to 9.5 - 10.0 with sodium hydroxide. 30 parts of the PR 101 was then added and mixture stirred for 30 minutes. This mixture was then passed through a media mill (0.5 mm steel shot in 0 an Bger Mill) to achieve a 20 minute residience time. A well dispersed fluid slurry was obtained and used for flushing in the above procedure.
  • a surfactant fatty acid mixture (Sylvata! DT-30 by Arizona Chemical)
  • inventive pre-dispersion and the inventive pigmented polymer show improved transparency, opacity, color strength and dispersion levels compared to polymers pigmented with dry pigment or pigment slurry (including onfy water).

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  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Dispersion Chemistry (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne des polymères de masse moléculaire élevée mélangés avec une prédispersion de pigment contenant un pigment aqueux et un support. La prédispersion et le polymère coloré présentent une intensité de couleur, un niveau de dispersion et une transparence/opacité supérieurs.
PCT/US2008/065798 2007-06-04 2008-06-04 Dispersion pour films plastiques Ceased WO2008151245A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US94191007P 2007-06-04 2007-06-04
US60/941,910 2007-06-04

Publications (1)

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WO2008151245A1 true WO2008151245A1 (fr) 2008-12-11

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PCT/US2008/065798 Ceased WO2008151245A1 (fr) 2007-06-04 2008-06-04 Dispersion pour films plastiques

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WO (1) WO2008151245A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9877923B2 (en) 2012-09-17 2018-01-30 Pfizer Inc. Process for preparing therapeutic nanoparticles
JP2019056085A (ja) * 2017-09-22 2019-04-11 富士ゼロックス株式会社 樹脂粒子分散液の製造方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050282962A1 (en) * 2004-06-17 2005-12-22 A. Schulman, Inc. Pigmentation of ionomers
WO2006002094A2 (fr) * 2004-06-17 2006-01-05 A. Schulman Invision Inc. Pigmentation d'ionomeres

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050282962A1 (en) * 2004-06-17 2005-12-22 A. Schulman, Inc. Pigmentation of ionomers
WO2006002094A2 (fr) * 2004-06-17 2006-01-05 A. Schulman Invision Inc. Pigmentation d'ionomeres

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9877923B2 (en) 2012-09-17 2018-01-30 Pfizer Inc. Process for preparing therapeutic nanoparticles
JP2019056085A (ja) * 2017-09-22 2019-04-11 富士ゼロックス株式会社 樹脂粒子分散液の製造方法

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